Widespread North American ocuurence of millstones made of imported French chert (French buhr) containing charophytes
Hannibal, Joseph T.
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Fossil charophytes belonging to the genus Gyrogona can be used to distinguish chert millstones made of French buhr (pierre meulière) from millstones made of domestic North American cherts. The occurrence of the charophytes Gyrogona medicaginula Lamarck and Gyrogona cf. G. medicaginula in millstones
imported from France has been previously documented for Massachusetts, Vermont, and Ohio in the United States. Additional localities with millstones containing Gyrogona are documented in this paper for the states of Arkansas, California, Colorado, Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Nebraska, New York, North Carolina, Virginia, and Wisconsin in the United States, and in the Province of Ontario in Canada. These widespread occurrences demonstrate the utility of charophytes as indicators of provenance of stone used for millstones. The geologic age and depositional environment (marine) of chert-bearing beds known to have been used for manufacture of millstones in North America are also noted.
NoteAnderson, T.J., Alonso, N. (eds), Tilting at Mills: The Archaeology and Geology of Mills and Milling. Revista d’Arqueologia de Ponent. Número Extra 4, 2019. ISBN: 9788491440291
Is part ofRevista d'arqueologia de Ponent, 2019, extra 4, p. 283-293
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Except where otherwise noted, this item's license is described as cc-by-nc (c) Joseph T. Hannibal, 2019
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